04-Layer 3—IP Services Command Reference

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10-IPv6 basics commands
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10-IPv6 basics commands 252.25 KB

Contents

IPv6 basics commands· 1

display ipv6 fib· 1

display ipv6 icmp statistics· 2

display ipv6 interface· 3

display ipv6 interface prefix· 7

display ipv6 neighbors· 8

display ipv6 neighbors count 10

display ipv6 neighbors entry-limit 10

display ipv6 neighbors vpn-instance· 11

display ipv6 pathmtu· 12

display ipv6 prefix· 13

display ipv6 rawip· 14

display ipv6 rawip verbose· 15

display ipv6 statistics· 17

display ipv6 tcp· 19

display ipv6 tcp verbose· 20

display ipv6 udp· 23

display ipv6 udp verbose· 24

ipv6 address· 26

ipv6 address anycast 27

ipv6 address auto· 28

ipv6 address auto link-local 28

ipv6 address eui-64· 29

ipv6 address link-local 30

ipv6 hop-limit 31

ipv6 hoplimit-expires enable· 32

ipv6 icmpv6 error-interval 32

ipv6 icmpv6 multicast-echo-reply enable· 33

ipv6 icmpv6 source· 34

ipv6 mtu· 34

ipv6 nd autoconfig managed-address-flag· 35

ipv6 nd autoconfig other-flag· 36

ipv6 nd dad attempts· 36

ipv6 nd ns retrans-timer 37

ipv6 nd nud reachable-time· 38

ipv6 nd ra halt 39

ipv6 nd ra hop-limit unspecified· 39

ipv6 nd ra interval 40

ipv6 nd ra no-advlinkmtu· 40

ipv6 nd ra prefix· 41

ipv6 nd ra router-lifetime· 42

ipv6 nd router-preference· 43

ipv6 neighbor 43

ipv6 neighbor link-local minimize· 45

ipv6 neighbor stale-aging· 45

ipv6 neighbors max-learning-num·· 46

ipv6 option drop enable· 47

ipv6 pathmtu· 47

ipv6 pathmtu age· 48

ipv6 prefer temporary-address· 49

ipv6 prefix· 49

ipv6 redirects enable· 50

ipv6 temporary-address· 51

ipv6 unreachables enable· 52

local-proxy-nd enable· 52

proxy-nd enable· 53

reset ipv6 neighbors· 53

reset ipv6 pathmtu· 54

reset ipv6 statistics· 55

 


IPv6 basics commands

The term "interface" in this chapter refers to VLAN interfaces.

display ipv6 fib

Use display ipv6 fib to display IPv6 FIB entries.

Syntax

display ipv6 fib [ vpn-instance vpn-instance-name ] [ ipv6-address [ prefix-length ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies a VPN instance by its name, a case-sensitive string of 1 to 31 characters.

ipv6-address: Specifies an IPv6 address.

prefix-length: Specifies a prefix length for the IPv6 address, in the range of 0 to 128.

Usage guidelines

If you do not specify a VPN, this command displays IPv6 FIB entries for the public network.

If you do not specify the prefix length, this command displays the IPv6 FIB entry longest matching the IPv6 address. If you specify a prefix, this command displays the IPv6 FIB entry that exactly matches the IPv6 address and prefix length.

If you do not specify any parameters, this command displays all IPv6 FIB entries for the public network.

Examples

# Display all IPv6 FIB entries for the public network.

<Sysname> display ipv6 fib

 

Destination count: 1 FIB entry count: 1

 

Flag:

  U:Useable   G:Gateway   H:Host   B:Blackhole   D:Dynamic   S:Static

  R:Relay     F:FRR

 

Destination: ::1                                           Prefix length: 128

Nexthop     : ::1                                            Flags: UH

Time stamp : 0x1                                            Label: Null

Interface  : InLoop0                                        Token: Invalid

Table 1 Command output

Field

Description

Destination count

Total number of destination addresses.

FIB entry count

Total number of IPv6 FIB entries.

Destination

Destination address.

Prefix length

Prefix length of the destination address.

Nexthop

Next hop.

Flags

Route flag:

·     UUsable route.

·     GGateway route.

·     HHost route.

·     BBlack hole route.

·     DDynamic route.

·     SStatic route.

·     RRecursive route.

·     FFast re-route.

Time stamp

Time when the IPv6 FIB entry was generated.

Label

Inner MPLS label.

Interface

Outgoing interface.

Token

Label switched path index number.

 

display ipv6 icmp statistics

Use display ipv6 icmp statistics to display ICMPv6 packet statistics.

Syntax

Centralized devices:

display ipv6 icmp statistics [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

This command displays statistics about received and sent ICMPv6 packets.

Examples

# Display ICMPv6 packet statistics.

<Sysname> display ipv6 icmp statistics

  Input: bad code                0           too short                  0

         checksum error          0           bad length                 0

         path MTU changed        0          destination unreachable  0

         too big                  0           parameter problem         0

         echo request            0           echo reply                  0

         neighbor solicit        0           neighbor advertisement   0

         router solicit          0           router advertisement      0

         redirect                 0           router renumbering         0

 output: parameter problem     0           echo request                0

         echo reply               0           unreachable no route       0

         unreachable admin       0           unreachable beyond scope 0

         unreachable address    0           unreachable no port        0

         too big                   0           time exceed transit       0

         time exceed reassembly 0           redirect                    0

         ratelimited               0           other errors               0

display ipv6 interface

Use display ipv6 interface to display IPv6 interface information.

Syntax

display ipv6 interface [ interface-type [ interface-number ] ] [ brief ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Interface type.

interface-number: Interface number.

brief: Displays brief information.

Usage guidelines

If you specify the brief keyword, this command displays brief information including physical status, link-layer protocols, and IPv6 address.

If you do not specify the brief keyword, this command displays detailed information including IPv6 configuration and operating information, and IPv6 packet statistics.

If you do not specify an interface, this command displays IPv6 information about all interfaces.

If you specify only the interface-type argument, this command displays IPv6 information about the interfaces of the specified type.

If you specify both the interface-type and the interface-number arguments, this command displays IPv6 information about the specified interface.

Examples

# Display IPv6 information about VLAN-interface 2.

<Sysname> display ipv6 interface vlan-interface 2

Vlan-interface2 current state: UP

Line protocol current state: UP

IPv6 is enabled, link-local address is FE80::1234:56FF:FE65:4322 [TENTATIVE]

  Global unicast address(es):

    10::1234:56FF:FE65:4322, subnet is 10::/64 [TENTATIVE] [AUTOCFG]

      [valid lifetime 4641s/preferred lifetime 4637s]

    20::1234:56ff:fe65:4322, subnet is 20::/64 [TENTATIVE] [EUI-64]

    30::1, subnet is 30::/64 [TENTATIVE] [ANYCAST]

    40::2, subnet is 40::/64 [TENTATIVE] [DHCP]

    50::3, subnet is 50::/64 [TENTATIVE]

  Joined group address(es):

    FF02::1

    FF02::2

    FF02::1:FF00:1

    FF02::1:FF65:4322

  MTU is 1500 bytes

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds

  ND retransmit interval is 1000 milliseconds

  Hosts use stateless autoconfig for addresses

IPv6 Packet statistics:

  InReceives:                     0

  InTooShorts:                  0

  InTruncatedPkts:             0

  InHopLimitExceeds:           0

  InBadHeaders:                 0

  InBadOptions:                 0

  ReasmReqds:                     0

  ReasmOKs:                           0

  InFragDrops:                  0

  InFragTimeouts:               0

  OutFragFails:                 0

  InUnknownProtos:                  0

  InDelivers:                     0

  OutRequests:                  0

  OutForwDatagrams:                 0

  InNoRoutes:                    0

  InTooBigErrors:               0

  OutFragOKs:                     0

  OutFragCreates:               0

  InMcastPkts:                  0

  InMcastNotMembers:                0

  OutMcastPkts:                  0

  InAddrErrors:                 0

  InDiscards:                    0

  OutDiscards:                   0

Table 2 Command output

Field

Description

Vlan-interface2 current state

Physical state of the interface:

·     Administratively DOWN—The VLAN interface has been administratively shut down by using the shutdown command.

·     DOWN—The VLAN interface is administratively up but its physical state is down because all ports in the VLAN are down.

·     UP—The administrative and physical states of the VLAN interface are both up.

Line protocol current state

Link layer protocol state of the interface:

·     DOWN—The link layer protocol state of the VLAN interface is down.

·     UP—The link layer protocol state of the VLAN interface is up.

IPv6 is enabled

IPv6 is enabled on the interface. This function is automatically enabled after an IPv6 address is configured for an interface.

link-local address

Link-local address of the interface.

Global unicast address(es)

Global unicast addresses of the interface.

IPv6 address states:

·     TENTATIVEInitial state. DAD is being performed or is to be performed on the address.

·     DUPLICATE—The address is not unique on the link.

·     PREFERRED—The address is preferred and can be used as the source or destination address of a packet. If an address is in this state, the command does not display the address state.

·     DEPRECATED—The address is beyond the preferred lifetime but in the valid lifetime. It is valid, but it cannot be used as the source address for a new connection. Packets destined to the address are processed correctly.

If a global unicast address is not manually configured, the following indicates how the address is obtained:

·     AUTOCFG—Stateless autoconfigured.

·     DHCPAssigned by a DHCPv6 server.

·     EUI-64Manually configured EUI-64 IPv6 address.

·     RANDOM—Random address automatically generated.

If the address is a manually configured anycast address, ANYCAST is marked.

valid lifetime

Specifies how long autoconfigured global unicast addresses using a prefix are valid.

preferred lifetime

Specifies how long autoconfigured global unicast addresses using a prefix are preferred.

Joined group address(es)

Addresses of multicast groups that the interface has joined.

MTU

Maximum transmission unit (MTU) of the interface.

ND DAD is enabled, number of DAD attempts

DAD is enabled.

·     If DAD is enabled, this field displays the number of attempts to send a NS message for DAD (set by using the ipv6 nd dad attempts command).

·     If DAD is disabled, this field displays ND DAD is disabled. To disable DAD, set the number of attempts to 0.

ND reachable time

Time during which a neighboring device is reachable.

ND retransmit interval

Interval for retransmitting an NS message.

Hosts use stateless autoconfig for addresses

Hosts obtained IPv6 addresses through stateless autoconfiguration.

InReceives

All IPv6 packets received by the interface, including error packets.

InTooShorts

Received IPv6 packets that are too short, with a length less than 40 bytes, for example.

InTruncatedPkts

Received IPv6 packets with a length less than that specified in the packets.

InHopLimitExceeds

Received IPv6 packets with a hop count exceeding the limit.

InBadHeaders

Received IPv6 packets with incorrect basic headers.

InBadOptions

Received IPv6 packets with incorrect extension headers.

ReasmReqds

Received IPv6 fragments.

ReasmOKs

Number of reassembled packets rather than the number of fragments.

InFragDrops

IPv6 fragments that are discarded because of certain errors.

InFragTimeouts

IPv6 fragments that are discarded because the amount of time they stayed in the system buffer exceeded the specified interval.

OutFragFails

Packets that failed to be fragmented on the output interface.

InUnknownProtos

Received IPv6 packets with unknown or unsupported protocol type.

InDelivers

Received IPv6 packets that are delivered to application layer protocols (such as ICMPv6, TCP, and UDP).

OutRequests

Local IPv6 packets sent by IPv6 application protocols.

OutForwDatagrams

Packets forwarded by the output interface.

InNoRoutes

Received IPv6 packets that are discarded because no matched route can be found.

InTooBigErrors

Received IPv6 packets that are discarded because they exceeded the Path MTU.

OutFragOKs

Fragmented packets on the output interface.

OutFragCreates

Number of fragmented packets on the output interface.

InMcastPkts

Received IPv6 multicast packets on the interface.

InMcastNotMembers

IPv6 multicast packets that are discarded because the interface did not join in the corresponding multicast group.

OutMcastPkts

IPv6 multicast packets sent by the interface.

InAddrErrors

IPv6 packets that are discarded due to invalid destination addresses.

InDiscards

IPv6 packets that are discarded due to resource problems rather than packet content errors.

OutDiscards

IPv6 packets that fail to be sent due to resource problems rather than packet errors.

 

# Display brief IPv6 information about all interfaces.

<Sysname> display ipv6 interface brief

*down: administratively down

(s): spoofing

Interface                                 Physical Protocol IPv6 Address

Vlan-interface1                          down       down      Unassigned

Vlan-interface2                          up          up        2001::1

Vlan-interface100                        up          up        Unassigned

Table 3 Command output

Field

Description

*down: administratively down

The interface has been administratively shut down by using the shutdown command.

(s): spoofing

Spoofing attribute of the interface.

The link protocol state of the interface is up, but the link is temporarily established on demand or does not exist.

Interface

Name of the interface.

Physical

Physical state of the interface:

·     *down—The interface has been shut down by using the shutdown command.

·     down—The interface is up but its physical state is down because all ports in the VLAN are down.

·     up—The administrative and physical states of the interface are both up.

Protocol

Link layer protocol state of the interface:

·     down—The network layer protocol state of the interface is down.

·     up—The network layer protocol state of the interface is up.

IPv6 Address

IPv6 address of the interface.

·     If at least one global unicast address is configured, this field displays the lowest address.

·     If no global unicast address is configured, this field displays the link-local address.

·     If no address is configured, this field displays Unassigned.

 

display ipv6 interface prefix

Use display ipv6 interface prefix to display IPv6 prefix information for an interface.

Syntax

display ipv6 interface interface-type interface-number prefix

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type interface-number: Specifies an interface by its type and number.

Examples

# Display IPv6 prefix information for VLAN-interface 10.

<Sysname> display ipv6 interface vlan-interface10 prefix

Prefix: 1001::/65                                          Origin: ADDRESS

Age:    -                                                     Flag:   AL

Lifetime(Valid/Preferred): 2592000/604800

 

Prefix: 2001::/64                                          Origin: STATIC

Age:    -                                                     Flag:   L

Lifetime(Valid/Preferred): 3000/2000

 

Prefix: 3001::/64                                          Origin: RA

Age:    600                                                   Flag:   A

Lifetime(Valid/Preferred): -

Table 4 Command output

Filed

Description

Prefix

IPv6 address prefix.

Origin

How the prefix is generated:

·     STATICManually configured by using the ipv6 nd ra prefix command.

·     RA—Advertised in RA messages after stateless autoconfiguration is enabled.

·     ADDRESSGenerated by a manually configured address.

Age

Aging time in seconds. If the prefix does not age out, this field displays a hyphen (-).

Flag

Flags advertised in RA messages. If no flags are available, this field displays a hyphen (-).

·     L—The address with the prefix is directly reachable on the link.

·     A—The prefix is used for stateless autoconfiguration.

Lifetime

Lifetime in seconds advertised in RA messages. If the prefix does not need to be advertised, this field displays a hyphen (-).

·     ValidValid lifetime of the prefix.

·     PreferredPreferred lifetime of the prefix.

 

Related commands

ipv6 nd ra prefix

display ipv6 neighbors

Use display ipv6 neighbors to display IPv6 neighbor information.

Syntax

display ipv6 neighbors { { ipv6-address | all | dynamic | static } [ slot slot-number ] | interface interface-type interface-number | vlan vlan-id } [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ipv6-address: Specifies the IPv6 address of a neighbor whose information is displayed.

all: Displays information about all neighbors, including neighbors acquired dynamically and configured statically on the public network and all private networks.

dynamic: Displays information about all neighbors acquired dynamically.

static: Displays information about all neighbors configured statically.

slot slot-number: Specifies an IRF member device by its member ID.

interface interface-type interface-number: Specifies an interface by its type and name.

vlan vlan-id: Specifies a VLAN by its ID. The value range for VLAN ID is 1 to 4094.

verbose: Displays detailed neighbor information.

Usage guidelines

You can use the reset ipv6 neighbors command to clear IPv6 neighbor information.

Examples

# Display all neighbor information.

<Sysname> display ipv6 neighbors all

         Type: S-Static    D-Dynamic    O-Openflow    I-Invalid

IPv6 address                   Link layer     VID  Interface      State T  Age

2::2                             0cda-415e-2332 N/A  M-GE0/0/0      STALE D  572

FE80::EDA:41FF:FE5E:2332     0cda-415e-2332 N/A  M-GE0/0/0      STALE D  562

# Display detailed information about all neighbors.

<Sysname> display ipv6 neighbors all verbose

         Type: S-Static    D-Dynamic    O-Openflow    I-Invalid

IPv6 Address: 2::2

Link Layer  : 0cda-415e-2332      VID : N/A  Interface: M-GE0/0/0

State        : STALE                 Type: D    Age       : 677

Vpn-instance: [No Vrf]

 

IPv6 Address: FE80::EDA:41FF:FE5E:2332

Link Layer  : 0cda-415e-2332      VID : N/A  Interface: M-GE0/0/0

State        : STALE                 Type: D    Age       : 667

Vpn-instance: [No Vrf]

Table 5 Command output

Field

Description

IPv6 Address

IPv6 address of a neighbor.

Link Layer

Link layer address (MAC address) of a neighbor.

VID

VLAN to which the interface connected with a neighbor belongs.

Interface

Interface connected with a neighbor.

State

State of a neighbor:

·     INCMPThe address is being resolved. The link layer address of the neighbor is unknown.

·     REACHThe neighbor is reachable.

·     STALEWhether the neighbor is reachable is unknown. The device does not verify the reachability any longer unless data is sent to the neighbor.

·     DELAYWhether the neighbor is reachable is unknown. The device sends an NS message after a delay.

·     PROBEWhether the neighbor is reachable is unknown. The device sends an NS message to verify the reachability of the neighbor.

Type

Neighbor information type:

·     SStatically configured.

·     DDynamically obtained.

·     O—Learned from the OpenFlow module.

·     IInvalid.

Age

A hyphen (-) indicates a static entry.

For a dynamic entry, this field displays the elapsed time in seconds. If the neighbor is never reachable, this field displays a pound sign (#).

Vpn-instance

Name of a VPN or [No Vrf] with no VPN configured.

 

Related commands

·     ipv6 neighbor

·     reset ipv6 neighbors

display ipv6 neighbors count

Use display ipv6 neighbors count to display the number of neighbor entries.

Syntax

display ipv6 neighbors { { all | dynamic | static } [ slot slot-number ] | interface interface-type interface-number | vlan vlan-id } count

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

all: Displays the total number of all neighbor entries, including neighbor entries created dynamically and configured statically.

dynamic: Displays the total number of neighbor entries created dynamically.

static: Displays the total number of neighbor entries configured statically.

slot slot-number: Specifies an IRF member device by its member ID.

interface interface-type interface-number: Specifies an interface by its type and name.

vlan vlan-id: Specifies a VLAN by its ID. The value range for VLAN ID is 1 to 4094.

Examples

# Display the total number of neighbor entries created dynamically.

<Sysname> display ipv6 neighbors dynamic count

 Total number of dynamic entries: 2

display ipv6 neighbors entry-limit

Use display ipv6 neighbors entry-limit to display the maximum number of ND entries that a device supports.

Syntax

display ipv6 neighbors entry-limit

Views

Any view

Predefined user roles

network-admin

network-operator

Examples

# Display the maximum number of ND entries that a device supports.

<Sysname> display ipv6 neighbors entry-limit

ND entries: 8192

display ipv6 neighbors vpn-instance

Use display ipv6 neighbors vpn-instance to display neighbor information about a VPN.

Syntax

display ipv6 neighbors vpn-instance vpn-instance-name [ count ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance-name: Specifies a VPN instance by its name, a case-sensitive string of 1 to 31 characters. The VPN must already exist.

count: Displays the total number of neighbor entries in the specified VPN.

Examples

# Display neighbor information about the VPN instance vpn1.

<Sysname> display ipv6 neighbors vpn-instance vpn1

                   Type: S-Static    D-Dynamic    O-Openflow    I-Invalid

IPv6 Address                   Link Layer      VID  Interface      State T  Age

FE80::200:5EFF:FE32:B800   0000-5e32-b800   N/A  M-GE0/0/0      REACH IS -

Table 6 Command output

Field

Description

IPv6 Address

IPv6 address of a neighbor.

Link-layer

Link layer address (MAC address) of a neighbor.

VID

VLAN to which the interface connected with a neighbor belongs.

Interface

Interface connected with a neighbor.

State

Neighbor state:

·     INCMPThe address is being resolved. The link layer address of the neighbor is unknown.

·     REACHThe neighbor is reachable.

·     STALEWhether the neighbor is reachable is unknown. The device does not verify the reachability any longer unless data is sent to the neighbor.

·     DELAYWhether the neighbor is reachable is unknown. The device sends an NS message after a delay.

·     PROBEWhether the neighbor is reachable is unknown. The device sends an NS message to verify the reachability of the neighbor.

T

Neighbor information type:

·     SStatically configured.

·     DDynamically obtained.

·     O—Learned from the OpenFlow module.

·     I—Invalid.

Age

A hyphen (-) indicates a static entry.

For a dynamic entry, this field displays the elapsed time in seconds. If the neighbor is never reachable, this field displays a pound sign (#).

 

display ipv6 pathmtu

Use the display ipv6 pathmtu command to display IPv6 Path MTU information.

Syntax

display ipv6 pathmtu [ vpn-instance vpn-instance-name ] { ipv6-address | { all | dynamic | static } [ count ] }

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies a VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify this option, the command displays IPv6 Path MTU information about the public network.

ipv6-address: Specifies the destination IPv6 address for which the Path MTU information is to be displayed.

all: Displays all Path MTU information for the public network.

dynamic: Displays all dynamic Path MTU information.

static: Displays all static Path MTU information.

count: Displays the total number of Path MTU entries.

Usage guidelines

Use display ipv6 pathmtu to display the IPv6 Path MTU information, including the dynamic Path MTUs and the static Path MTUs.

Examples

# Display all Path MTU information.

<Sysname> display ipv6 pathmtu all

IPv6 destination address                PathMTU   Age   Type

1:2::3:2                                   1800       -      Static

1:2::4:2                                   1400       10     Dynamic

1:2::5:2                                   1280       10     Dynamic

# Displays the total number of Path MTU entries.

<Sysname> display ipv6 pathmtu all count

Total number of entries: 3

Table 7  Command output

Field

Description

PathMTU

Path MTU value on the network path to an IPv6 address.

Age

Time for a Path MTU to live. For a static Path MTU, this field displays a hyphen (-).

Type

Indicates that the Path MTU is dynamically negotiated or statically configured.

Total number of entries

Total number of Path MTU entries.

 

Related commands

·     ipv6 pathmtu

·     reset ipv6 pathmtu

display ipv6 prefix

Use display ipv6 prefix to display information about dynamic and static IPv6 prefixes.

Syntax

display ipv6 prefix [ prefix-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

prefix-number: Specifies the ID of an IPv6 prefix, in the range of 1 to 1024. If this argument is not specified, the command displays information about all IPv6 prefixes.

Usage guidelines

A static IPv6 prefix is configured by using the ipv6 prefix command.

A dynamic IPv6 prefix is obtained from the DHCPv6 server, and its prefix ID is configured by using the ipv6 dhcp client pd command.

Examples

# Display information about all IPv6 prefixes.

<Sysname> display ipv6 prefix

Number  Prefix                                     Type

1        1::/16                                     Static

2        11:77::/32                                Dynamic

# Display information about the IPv6 prefix with prefix ID 1.

<Sysname> display ipv6 prefix 1

Number: 1

Type  : Dynamic

Prefix: ABCD:77D8::/32

Preferred lifetime 90 sec, valid lifetime 120 sec

Table 8 Command output

Field

Description

Number

Prefix ID.

Type

Prefix type:

·     Static—Static IPv6 prefix.

·     Dynamic—Dynamic IPv6 prefix.

Prefix

Prefix and its length. If no prefix is obtained, this field displays Not-available.

Preferred lifetime 90 sec

Preferred lifetime in seconds. For a static IPv6 prefix, this field is not displayed.

valid lifetime 120 sec

Valid lifetime in seconds. For a static IPv6 prefix, this field is not displayed.

 

Related commands

·     ipv6 dhcp client pd (Layer 3IP Services Command Reference)

·     ipv6 prefix

display ipv6 rawip

Use display ipv6 rawip to display brief information about IPv6 RawIP connections.

Syntax

display ipv6 rawip [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

Brief information about IPv6 RawIP connections includes the local and peer IPv6 addresses, protocol number, and PCB.

Examples

# Display brief information about IPv6 RawIP connections.

<Sysname> display ipv6 rawip

Local Addr            Foreign Addr        Protocol  Slot   PCB

2001:2002:2003:2      3001:3002:3003:3    58        1      0x0000000000000009

004:2005:2006:20      004:3005:3006:30

07:2008                 07:3008

2002::100              2002::138             58        1      0x0000000000000008

::                      ::                      58        1      0x0000000000000002

Table 9 Command output

Field

Description

Local Addr

Local IPv6 address.

Foreign Addr

Peer IPv6 address.

Protocol

Protocol number.

Slot

ID of the IRF member device.

PCB

PCB index.

 

display ipv6 rawip verbose

Use display ipv6 rawip verbose to display detailed information about IPv6 RawIP connections.

Syntax

display ipv6 rawip verbose [ slot slot-number [ pcb pcb-index ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

pcb pcb-index: Specifies a PCB by its index in the range of 1 to 16.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

Detailed information about an IPv6 RawIP connection includes socket's creator, state, option, type, and protocol number, and source and destination IPv6 addresses of the connection.

Examples

# Display detailed information about an IPv6 RawIP connection.

<Sysname> display ipv6 rawip verbose

Total RawIP socket number: 1

 Slot: 6

 Creator: ping ipv6[320]

 State: N/A

 Options: N/A

 Error: 0

 Receiving buffer(cc/hiwat/lowat/drop/state): 0 / 9216 / 1 / 0 / N/A

 Sending buffer(cc/hiwat/lowat/state): 0 / 9216 / 512 / N/A

 Type: 3

 Protocol: 58

 Connection info: src = ::, dst = ::

 Inpcb flags: N/A

 Inpcb vflag: INP_IPV6

 Hop limit: 255 (minimum hop limit: 0)

 Send VRF: 0xffff

 Receive VRF: 0xffff

Table 10 Command output

Field

Description

Total RawIP socket number

Total number of IPv6 RawIP sockets.

Slot

ID of the IRF member device.

Creator

Task name of the socket. The process number is in the square brackets.

State

Socket state.

Options

Socket options.

Receiving buffer (cc/hiwat/lowat/drop/state)

Displays receive buffer information in the following order:

·     cc—Used space.

·     hiwat—Maximum space.

·     lowat—Minimum space.

·     dropNumber of dropped packets.

·     state—Buffer state:

¡     CANTSENDMOREUnable to send data to the peer.

¡     CANTRCVMOREUnable to receive data from the peer.

¡     RCVATMARKReceiving tag.

¡     N/ANone of the above states.

Sending buffer(cc/hiwat/lowat/state)

Displays send buffer information in the following order:

·     cc—Used space.

·     hiwat—Maximum space.

·     lowat—Minimum space.

·     state—Buffer state:

¡     CANTSENDMOREUnable to send data to the peer.

¡     CANTRCVMOREUnable to receive data from the peer.

¡     RCVATMARKReceiving tag.

¡     N/ANone of the above states.

Type

Socket type:

·     1SOCK_STREAM. This socket uses TCP to provide reliable transmission of byte streams.

·     2SOCK_DGRAM. This socket uses UDP to provide datagram transmission.

·     3SOCK_RAW. This socket allows an application to change the next upper-layer protocol header.

·     N/ANone of the above types.

Protocol

Number of protocol using the socket. 58 represents ICMP.

Connection info

Connection information, including the source and destination IPv6 addresses.

Inpcb flags

Flags in the Internet PCB:

·     INP_RECVOPTSReceives IPv6 options.

·     INP_RECVRETOPTSReceives replied IPv6 options.

·     INP_RECVDSTADDRReceives destination IPv6 address.

·     INP_HDRINCLProvides the entire IPv6 header.

·     INP_REUSEADDR—Reuses the IPv6 address.

·     INP_REUSEPORT—Reuses the port number.

·     INP_ANONPORTPort number not specified.

·     INP_PROTOCOL_PACKET—Identifies a protocol packet.

·     INP_RCVVLANID—Receives the VLAN ID of the packet. Only UDP and RawIP support this flag.

·     IN6P_IPV6_V6ONLY—Only supports IPv6 protocol stack.

·     IN6P_PKTINFO—Receives the source IPv6 address and input interface of the packet.

·     IN6P_HOPLIMIT—Receives the hop limit.

·     IN6P_HOPOPTSReceives the hop-by-hop options extension header.

·     IN6P_DSTOPTSReceives the destination options extension header.

·     IN6P_RTHDRReceives the routing extension header.

·     IN6P_RTHDRDSTOPTSReceives the destination options extension header preceding the routing extension header.

·     IN6P_TCLASSReceives the traffic class of the packet.

·     IN6P_AUTOFLOWLABELAttaches a flow label automatically.

·     IN6P_RFC2292Uses the API specified in RFC 2292.

·     IN6P_MTUDiscovers differences in the MTU size of every link along a given data path. TCP does not support this flag.

·     INP_RCVMACADDR—Receives the MAC address of the frame.

·     INP_USEICMPSRC—Uses the specified IPv6 address as the source IPv6 address for outgoing ICMP packets.

·     INP_SYNCPCB—Waits until Internet PCB is synchronized.

·     N/ANone of the above flags.

Inpcb vflag

IP version flag in the Internet PCB:

·     INP_IPV4—IPv4 protocol.

·     INP_IPV6IPv6 protocol.

·     INP_IPV6PROTO—Creates an Internet PCB based on IPv6 protocol.

·     INP_TIMEWAIT—In TIMEWAIT state.

·     INP_ONESBCAST—Sends broadcast packets.

·     INP_DROPPEDProtocol dropped flag.

·     INP_SOCKREFStrong socket reference.

·     INP_DONTBLOCKDo not block synchronization of the Internet PCB.

·     N/ANone of the above flags.

Hop limit(minimum hop limit)

Hop limit in the Internet PCB. The minimum number of hops is displayed in the parentheses.

Send VRF

Sent instances.

Receive VRF

Received instances.

 

display ipv6 statistics

Use display ipv6 statistics to display IPv6 and ICMPv6 packet statistics.

Syntax

display ipv6 statistics [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

This command displays statistics about received and sent IPv6 and ICMPv6 packets.

Use the reset ipv6 statistics command to clear the statistics of all IPv6 and ICMPv6 packets.

If the slot slot-number option is not specified, this command displays IPv6 and ICMPv6 packet statistics on all IRF member devices.

Examples

# Display IPv6 and ICMPv6 packet statistics.

<Sysname> display ipv6 statistics

  IPv6 statistics:

 

    Sent packets:

      Total:      0

        Sent locally:         0            Forwarded:              0

        Raw packets:          0            Discarded:              0

        Fragments:            0            Fragments failed:      0

        Routing failed:       0

 

    Received packets:

      Total:      0

        Received locally:     0            Hop limit exceeded:  0

        Fragments:             0            Reassembled:           0

        Reassembly failures:  0            Reassembly timeout:  0

        Format errors:         0            Option errors:        0

        Protocol errors:      0

 

  ICMPv6 statistics:

 

    Sent packets:

      Total:      0

        Unreachable:           0             Too big:                0

        Hop limit exceeded:   0             Reassembly timeouts: 0

        Parameter problems:   0

        Echo requests:         0             Echo replies:          0

        Neighbor solicits:    0             Neighbor adverts:     0

        Router solicits:      0             Router adverts:        0

        Redirects:             0

      Send failed:

        Rate limitation:      0             Other errors:          0

 

    Received packets:

      Total:      0

        Checksum errors:      0             Too short:              0

        Bad codes:             0

        Unreachable:           0             Too big:                 0

        Hop limit exceeded:   0             Reassembly timeouts:   0

        Parameter problems:   0             Unknown error types:   0

        Echo requests:         0             Echo replies:           0

        Neighbor solicits:    0             Neighbor adverts:      0

        Router solicits:       0             Router adverts:        0

        Redirects:              0             Router renumbering:   0

        Unknown info types:   0

      Deliver failed:

        Bad length:           0

Related commands

reset ipv6 statistics

display ipv6 tcp

Use display ipv6 tcp to display brief information about IPv6 TCP connections.

Syntax

display ipv6 tcp [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

Brief information about IPv6 TCP connections includes the local IPv6 address and port number, peer IPv6 address and port number, and TCP connection state.

Examples

# Display brief information about IPv6 TCP connections.

<Sysname> display ipv6 tcp

*: TCP MD5 Connection

 LAddr->port         FAddr->port       State       Slot  PCB

*2001:2002:2003:2   3001:3002:3003:3  ESTABLISHED 1    0x000000000000c387

004:2005:2006:20    004:3005:3006:30

07:2008->1200        07:3008->1200

2001::1->23          2001::5->1284     ESTABLISHED 1     0x0000000000000008

2003::1->25          2001::2->1283     LISTEN       1     0x0000000000000009

Table 11 Command output

Field

Description

*

Indicates the TCP connection uses MD5 authentication.

LAddr->port

Local IPv6 address and port number.

FAddr->port

Peer IPv6 address and port number.

State

TCP connection state:

·     CLOSED—The server receives a disconnection request's reply from the client.

·     LISTEN—The server is waiting for connection requests.

·     SYN_SENT—The client is waiting for the server to reply to the connection request.

·     SYN_RCVD—The server receives a connection request.

·     ESTABLISHED—The server and client have established connections and can transmit data bidirectionally.

·     CLOSE_WAITThe server receives a disconnection request from the client.

·     FIN_WAIT_1The client is waiting for the server to reply to a disconnection request.

·     CLOSING—The server and client are waiting for peer's disconnection reply when receiving disconnection requests from each other.

·     LAST_ACKThe server is waiting for the client to reply to a disconnection request.

·     FIN_WAIT_2The client receives a disconnection reply from the server.

·     TIME_WAIT—The client receives a disconnection request from the server.

Slot

ID of the IRF member device.

PCB

PCB index.

 

display ipv6 tcp verbose

Use display ipv6 tcp verbose to display detailed information about IPv6 TCP connections.

Syntax

display ipv6 tcp verbose [ slot slot-number [ pcb pcb-index ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

pcb pcb-index: Specifies a PCB by its index in the range of 1 to 16.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

Detailed information about an IPv6 TCP connection includes socket's creator, state, option, type, protocol number, source IPv6 address and port number, destination IPv6 address and port number, and the connection state.

Examples

# Display detailed information about an IPv6 TCP connection.

<Sysname> display ipv6 tcp verbose

TCP inpcb number: 1(tcpcb number: 1)

 

 Slot: 6

 Creator: telnetd_mips[199]

 State: ISCONNECTED

 Options: N/A

 Error: 0

 Receiving buffer(cc/hiwat/lowat/state): 0 / 65536 / 1 / N/A

 Sending buffer(cc/hiwat/lowat/state): 0 / 65536 / 512 / N/A

 Type: 1

 Protocol: 6

 Connection info: src = 2001::1->23 ,  dst = 2001::2->4181

 Inpcb flags: N/A

 Inpcb vflag: INP_IPV6

 Hop limit: 255 (minimum hop limit: 0)

 Connection state: ESTABLISHED

 Send VRF: 0x0

 Receive VRF: 0x0

Table 12 Command output

Field

Description

TCP inpcb number

Number of IPv6 TCP Internet PCBs.

tcpcb number

Number of IPv6 TCP PCBs (excluding PCBs of TCP in TIME_WAIT state).

Slot

ID of the IRF member device.

Creator

Task name of the socket. The process number is in the square brackets.

State

Socket state.

Options

Socket options.

Error

Error code.

Receiving buffer(cc/hiwat/lowat/state)

Displays receive buffer information in the following order:

·     cc—Used space.

·     hiwat—Maximum space.

·     lowat—Minimum space.

·     state—Buffer state:

¡     CANTSENDMOREUnable to send data to the peer.

¡     CANTRCVMOREUnable to receive data from the peer.

¡     RCVATMARKReceiving tag.

¡     N/ANone of the above states.

Sending buffer(cc/hiwat/lowat/state)

Displays send buffer information in the following order:

·     cc—Used space.

·     hiwat—Maximum space.

·     lowat—Minimum space.

·     state—Buffer state:

¡     CANTSENDMOREUnable to send data to the peer.

¡     CANTRCVMOREUnable to receive data from the peer.

¡     RCVATMARKReceiving tag.

¡     N/ANone of the above states.

Type

Socket type:

·     1SOCK_STREAM. This socket uses TCP to provide reliable transmission of byte streams.

·     2SOCK_DGRAM. This socket uses UDP to provide datagram transmission.

·     3SOCK_RAW. This socket allows an application to change the next upper-layer protocol header.

·     N/ANone of the above types.

Protocol

Number of the protocol using the socket. 6 represents TCP.

Connection info

Connection information, including source IPv6 address and port number, and destination IPv6 address and port number.

Inpcb flags

Flags in the Internet PCB:

·     INP_RECVOPTSReceives IPv6 options.

·     INP_RECVRETOPTSReceives replied IPv6 options.

·     INP_RECVDSTADDRReceives destination IPv6 address.

·     INP_HDRINCLProvides the entire IPv6 header.

·     INP_REUSEADDR—Reuses the IPv6 address.

·     INP_REUSEPORT—Reuses the port number.

·     INP_ANONPORTPort number not specified.

·     INP_PROTOCOL_PACKET—Identifies a protocol packet.

·     INP_RCVVLANID—Receives the VLAN ID of the packet. Only UDP and RawIP support this flag.

·     IN6P_IPV6_V6ONLY—Only supports IPv6 protocol stack.

·     IN6P_PKTINFO—Receives the source IPv6 address and input interface of the packet.

·     IN6P_HOPLIMIT—Receives the hop limit.

·     IN6P_HOPOPTSReceives the hop-by-hop options extension header.

·     IN6P_DSTOPTSReceives the destination options extension header.

·     IN6P_RTHDRReceives the routing extension header.

·     IN6P_RTHDRDSTOPTSReceives the destination options extension header preceding the routing extension header.

·     IN6P_TCLASSReceives the traffic class of the packet.

·     IN6P_AUTOFLOWLABELAttaches a flow label automatically.

·     IN6P_RFC2292Uses the API specified in RFC 2292.

·     IN6P_MTUDiscovers differences in the MTU size of every link along a given data path. TCP does not support this flag.

·     INP_RCVMACADDR—Receives the MAC address of the frame.

·     INP_SYNCPCB—Waits until Internet PCB is synchronized.

·     N/ANone of the above flags.

Inpcb vflag

IP version flags in the Internet PCB:

·     INP_IPV4—IPv4 protocol.

·     INP_IPV6IPv6 protocol.

·     INP_IPV6PROTO—Creates an Internet PCB based on IPv6 protocol.

·     INP_TIMEWAIT—In TIMEWAIT state.

·     INP_ONESBCAST—Sends broadcast packets.

·     INP_DROPPEDProtocol dropped flag.

·     INP_SOCKREFStrong socket reference.

·     INP_DONTBLOCKDo not block synchronization of the Internet PCB.

·     N/ANone of the above flags.

Hop limit(minimum hop limit)

Hop limit in the Internet PCB. The minimum number of hops is in the parentheses.

Connection state

TCP connection state:

·     CLOSED—The server receives a disconnection request's reply from the client.

·     LISTEN—The server is waiting for connection requests.

·     SYN_SENT—The client is waiting for the server to reply to the connection request.

·     SYN_RCVD—The server receives a connection request.

·     ESTABLISHED—The server and client have established connections and can transmit data bidirectionally.

·     CLOSE_WAITThe server receives a disconnection request from the client.

·     FIN_WAIT_1The client is waiting for the server to reply to a disconnection request.

·     CLOSING—The server and client are waiting for peer's disconnection reply when receiving disconnection requests from each other.

·     LAST_ACKThe server is waiting for the client to reply to a disconnection request.

·     FIN_WAIT_2The client receives a disconnection reply from the server.

·     TIME_WAIT—The client receives a disconnection request from the server.

Send VRF

Sent instances.

Receive VRF

Received instances.

 

display ipv6 udp

Use display ipv6 udp to display brief information about IPv6 UDP connections.

Syntax

display ipv6 udp [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

Brief information about an IPv6 UDP connection includes local IPv6 address and port number, and peer IPv6 address and port number.

Examples

# Displays brief information about IPv6 UDP connections.

<Sysname> display ipv6 udp

 LAddr->port         FAddr->port         Slot   PCB

 2001:2002:2003:2   3001:3002:3003:3   1       0x000000000000c387

 004:2005:2006:20   004:3005:3006:30

 07:2008->1200      07:3008->1200

 2001::1->23         2001::5->1284       1        0x0000000000000008

 2003::1->25         2001::2->1283       1       0x0000000000000009

Table 13 Command output

Field

Description

LAddr->port

Local IPv6 address and port number.

FAddr->port

Peer IPv6 address and port number.

Slot

ID of the IRF member device.

PCB

PCB index.

 

display ipv6 udp verbose

Use display ipv6 udp verbose to display detailed information about IPv6 UDP connections.

Syntax

display ipv6 udp verbose [ slot slot-number [ pcb pcb-index ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

pcb pcb-index: Specifies a PCB by its index in the range of 1 to 16.

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

Detailed information about an IPv6 UDP connection includes socket's creator, state, option, type, protocol number, source IPv6 address and port number, destination IPv6 address and port number, and the connection state.

Examples

# Display detailed information about an IPv6 UDP connection.

<Sysname> display ipv6 udp verbose

Total UDP socket number: 1

 

 Slot: 6

 Creator: sock_test_mips[250]

 State: N/A

 Options: N/A

 Error: 0

 Receiving buffer(cc/hiwat/lowat/drop/state): 0 / 41600 / 1 / 0 / N/A

 Sending buffer(cc/hiwat/lowat/state): 0 / 9216 / 512 / N/A

 Type: 2

 Protocol: 17

 Connection info: src = ::->69, dst = ::->0

 Inpcb flags: N/A

 Inpcb vflag: INP_IPV6

 Hop limit: 255 (minimum hop limit: 0)

 Send VRF: 0xffff

 Receive VRF: 0xffff

Table 14 Command output

Field

Description

Total UDP socket number

Total number of IPv6 UDP sockets.

Slot

ID of the IRF member device.

Creator

Task name of the socket. The progress number is in the square brackets.

State

Socket state.

Options

Socket options.

Error

Error code.

Receiving buffer(cc/hiwat/lowat/drop/state)

Displays receive buffer information in the following order:

·     cc—Used space.

·     hiwat—Maximum space.

·     lowat—Minimum space.

·     dropNumber of dropped packets.

·     state—Buffer state:

¡     CANTSENDMOREUnable to send data to the peer.

¡     CANTRCVMOREUnable to receive data from the peer.

¡     RCVATMARKReceiving tag.

¡     N/ANone of the above states.

Sending buffer(cc/hiwat/lowat/state)

Displays send buffer information in the following order:

·     cc—Used space.

·     hiwat—Maximum space.

·     lowat—Minimum space.

·     state—Buffer state:

¡     CANTSENDMOREUnable to send data to the peer.

¡     CANTRCVMOREUnable to receive data from the peer.

¡     RCVATMARKReceiving tag.

¡     N/ANone of the above states.

Type

Socket type:

·     1SOCK_STREAM. This socket uses TCP to provide reliable transmission of byte streams.

·     2SOCK_DGRAM. This socket uses UDP to provide datagram transmission.

·     3SOCK_RAW. This socket allows an application to change the next upper-layer protocol header.

·     N/ANone of the above types.

Protocol

Number of the protocol using the socket. 17 represents UDP.

Connection info

Connection information, including source IPv6 address and port number, and destination IPv6 address and port number.

Inpcb flags

Flags in the Internet PCB:

·     INP_RECVOPTSReceives IPv6 options.

·     INP_RECVRETOPTSReceives replied IPv6 options.

·     INP_RECVDSTADDRReceives destination IPv6 address.

·     INP_HDRINCLProvides the entire IPv6 header.

·     INP_REUSEADDR—Reuses the IPv6 address.

·     INP_REUSEPORT—Reuses the port number.

·     INP_ANONPORTPort number not specified.

·     INP_PROTOCOL_PACKET—Identifies a protocol packet.

·     INP_RCVVLANID—Receives the VLAN ID of the packet. Only UDP and RawIP support this flag.

·     IN6P_IPV6_V6ONLY—Only supports IPv6 protocol stack.

·     IN6P_PKTINFO—Receives the source IPv6 address and input interface of the packet.

·     IN6P_HOPLIMIT—Receives the hop limit.

·     IN6P_HOPOPTSReceives the hop-by-hop options extension header.

·     IN6P_DSTOPTSReceives the destination options extension header.

·     IN6P_RTHDRReceives the routing extension header.

·     IN6P_RTHDRDSTOPTSReceives the destination options extension header preceding the routing extension header.

·     IN6P_TCLASSReceives the traffic class of the packet.

·     IN6P_AUTOFLOWLABELAttaches a flow label automatically.

·     IN6P_RFC2292Uses the API specified in RFC 2292.

·     IN6P_MTUDiscovers differences in the MTU size of every link along a given data path. TCP does not support this flag.

·     INP_RCVMACADDR—Receives the MAC address of the frame.

·     INP_SYNCPCB—Waits until Internet PCB is synchronized.

·     N/ANone of the above flags.

Inpcb vflag

IP version flags in the Internet PCB:

·     INP_IPV4—IPv4 protocol.

·     INP_IPV6IPv6 protocol.

·     INP_IPV6PROTO—Creates an Internet PCB based on IPv6 protocol.

·     INP_TIMEWAIT—In TIMEWAIT state.

·     INP_ONESBCAST—Sends broadcast packets.

·     INP_DROPPEDProtocol dropped flag.

·     INP_SOCKREFStrong socket reference.

·     INP_DONTBLOCKDo not block synchronization of the Internet PCB.

·     N/ANone of the above flags.

Hop limit(minimum hop limit)

Hop limit in the Internet PCB. The minimum number of hops is in the parentheses.

Send VRF

Sent instances.

Receive VRF

Received instances.

 

ipv6 address

Use ipv6 address to configure an IPv6 global unicast address for an interface.

Use undo ipv6 address to remove the IPv6 global unicast address of the interface.

Syntax

ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length }

undo ipv6 address [ ipv6-address prefix-length | ipv6-address/prefix-length ]

Default

No IPv6 global unicast address is configured for an interface.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies an IPv6 address.

prefix-length: Specifies a prefix length in the range of 1 to 128.

Usage guidelines

Like public IPv4 addresses, IPv6 global unicast addresses are assigned to ISPs. This type of address allows for prefix aggregation to reduce the number of global routing entries.

If you do not specify any parameters, the undo ipv6 address command removes all IPv6 addresses of an interface.

Examples

# Set the IPv6 global unicast address of VLAN-interface 100 to 2001::1 with prefix length 64.

Method 1:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1/64

Method 2:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1 64

ipv6 address anycast

Use ipv6 address anycast to configure an IPv6 anycast address for an interface.

Use undo ipv6 address anycast to remove the IPv6 anycast address of the interface.

Syntax

ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length } anycast

undo ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length } anycast

Default

No IPv6 anycast address is configured for an interface.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies an IPv6 anycast address.

prefix-length: Specifies a prefix length in the range of 1 to 128.

Examples

# Set the IPv6 anycast address of VLAN-interface 100 to 2001::1 with prefix length 64.

Method 1:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1/64 anycast

Method 2:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1 64 anycast

ipv6 address auto

Use ipv6 address auto to enable the stateless address autoconfiguration function on an interface, so that the interface can automatically generate a global unicast address.

Use undo ipv6 address auto to disable this function.

Syntax

ipv6 address auto

undo ipv6 address auto

Default

The stateless address autoconfiguration function is disabled.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

After a global unicast address is generated through stateless autoconfiguration, a link-local address is generated automatically.

To remove the global unicast address and the link-local address that are automatically generated, use the undo ipv6 address auto command or the undo ipv6 address command.

Examples

# Enable stateless address autoconfiguration on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address auto

ipv6 address auto link-local

Use ipv6 address auto link-local to automatically generate a link-local address for an interface.

Use undo ipv6 address auto link-local to remove the automatically generated link-local address for the interface.

Syntax

ipv6 address auto link-local

undo ipv6 address auto link-local

Default

No link-local address is configured on an interface. A link-local address is automatically generated after an IPv6 global unicast address is configured for the interface.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

Link-local addresses are used for neighbor discovery and stateless autoconfiguration on the local link. Packets using link-local addresses as the source or destination addresses cannot be forwarded to other links.

After an IPv6 global unicast address is configured for an interface, an automatically generated link-local address is the same as the one generated by using the ipv6 address auto link-local command.

Only use the undo ipv6 address auto link-local command to remove the link-local addresses generated through the ipv6 address auto link-local command.

·     After the undo ipv6 address auto link-local command is used on an interface that has an IPv6 global unicast address configured, the interface still has a link-local address.

·     If the interface has no IPv6 global unicast address configured, it has no link-local address.

Manual assignment takes precedence over automatic generation.

·     If you first adopt automatic generation and then manual assignment, the manually assigned link-local address overwrites the automatically generated address.

·     If you first use manual assignment and then automatic generation, both of the following occur:

¡     The automatically generated link-local address does not take effect.

¡     The link-local address of an interface is still the manually assigned address.

If you delete the manually assigned address, the automatically generated link-local address takes effect.

For more information about manually assignment of an IPv6 link-local address, see the ipv6 address link-local command.

Examples

# Configure VLAN-interface 100 to automatically generate a link-local address.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address auto link-local

Related commands

ipv6 address link-local

ipv6 address eui-64

Use ipv6 address eui-64 to configure an EUI-64 IPv6 address for an interface.

Use undo ipv6 address eui-64 to remove the EUI-64 IPv6 address of the interface.

Syntax

ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length } eui-64

undo ipv6 address [ ipv6-address prefix-length | ipv6-address/prefix-length ] eui-64

Default

No EUI-64 IPv6 address is configured for an interface.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-address/prefix-length: Specifies an IPv6 address and IPv6 prefix length. The ipv6-address and prefix-length arguments jointly specify the prefix of an EUI-64 IPv6 address. The value range for the prefix-length argument is 1 to 64.

Usage guidelines

An EUI-64 IPv6 address is generated based on the specified prefix and the automatically generated interface identifier. To display the EUI-64 IPv6 address, use the display ipv6 interface command.

The prefix length of an EUI-64 IPv6 address cannot be greater than 64.

Examples

# Configure an EUI-64 IPv6 address for VLAN-interface 100. The prefix of the address is the same as that of 2001::1/64, and the interface ID is generated based on the MAC address of the device.

Method 1:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1/64 eui-64

Method 2:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1 64 eui-64

Related commands

display ipv6 interface

ipv6 address link-local

Use ipv6 address link-local to configure a link-local address for the interface.

Use undo ipv6 address link-local to remove the link-local address of the interface.

Syntax

ipv6 address ipv6-address link-local

undo ipv6 address ipv6-address link-local

Default

No link-local address is configured for the interface.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-address: IPv6 link-local address. The first 10 bits of an address must be 1111111010 (binary). The first group of hexadecimals in the address must be FE80 to FEBF.

Usage guidelines

Manual assignment takes precedence over automatic generation.

If you adopt automatic generation, and then use manual assignment, the manually assigned link-local address overwrites the one that is automatically generated.

If you adopt manual assignment and then use automatic generation, both of the following occur:

·     The automatically generated link-local address does not take effect.

·     The manually assigned link-local address of an interface remains.

After you delete the manually assigned address, the automatically generated link-local address takes effect. For automatic generation of an IPv6 link-local address, see the ipv6 address auto link-local command.

Examples

# Configure a link-local address for VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address fe80::1 link-local

Related commands

ipv6 address auto link-local

ipv6 hop-limit

Use ipv6 hop-limit to set the Hop Limit field in the IPv6 header.

Use undo ipv6 hop-limit to restore the default.

Syntax

ipv6 hop-limit value

undo ipv6 hop-limit

Default

The hop limit is 64.

Views

System view

Predefined user roles

network-admin

Parameters

Value: Specifies the number of hops, in the range of 1 to 255.

Usage guidelines

The hop limit determines the number of hops that an IPv6 packet generated by the device can travel.

If the device advertises the hop limit in RA messages (set by using the undo ipv6 nd ra hop-limit unspecified command), all RA message receivers use the value set by using the ipv6 hop-limit command to fill in the Hop Limit field.

Examples

# Set the maximum number of hops to 100.

<Sysname> system-view

[Sysname] ipv6 hop-limit 100

Related commands

ipv6 nd ra hop-limit unspecified

ipv6 hoplimit-expires enable

Use ipv6 hoplimit-expires enable to enable sending ICMPv6 Time Exceeded messages.

Use undo ipv6 hoplimit-expires to disable sending ICMPv6 Time Exceeded messages.

Syntax

ipv6 hoplimit-expires enable

undo ipv6 hoplimit-expires enable

Default

Sending ICMPv6 Time Exceeded messages is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

ICMPv6 Time Exceeded messages are sent to the source of IPv6 packets after the device discards IPv6 packets because hop or reassembly times out.

To prevent too many ICMPv6 error messages from affecting device performance, disable this function. Even with the function disabled, the device still sends Fragment Reassembly Time Exceeded messages.

Examples

# Disable sending ICMPv6 Time Exceeded messages.

<Sysname> system-view

[Sysname] undo ipv6 hoplimit-expires enable

ipv6 icmpv6 error-interval

Use ipv6 icmpv6 error-interval to set the bucket size and the interval for tokens to arrive in the bucket for ICMPv6 error messages.

Use undo ipv6 icmpv6 error-interval to restore the default.

Syntax

ipv6 icmpv6 error-interval milliseconds [ bucketsize ]

undo ipv6 icmpv6 error-interval

Default

The bucket allows a maximum of 10 tokens, and tokens are placed in the bucket at the interval of 100 milliseconds.

Views

System view

Predefined user roles

network-admin

Parameters

milliseconds: Specifies the interval for tokens to arrive in the bucket. The value range is 0 to 2147483647 milliseconds, and the default is 100 milliseconds. To disable the ICMPv6 rate limit, set the value to 0.

bucketsize: Specifies the maximum number of tokens allowed in the bucket. The value range is 1 to 200, and the default is 10.

Usage guidelines

To avoid sending excessive ICMPv6 error messages within a short period that might cause network congestion, you can use the command to limit the rate at which ICMPv6 error messages are sent. A token bucket algorithm is used with one token representing one ICMPv6 error message.

Tokens are placed in the bucket at intervals until the maximum number of tokens that the bucket can hold is reached.

Tokens are removed from the bucket when ICMPv6 error messages are sent. When the bucket is empty, ICMPv6 error messages are not sent until a new token is placed in the bucket.

Examples

# Configure an interval of 200 milliseconds and bucket size of 40 tokens for ICMPv6 error messages.

<Sysname> system-view

[Sysname] ipv6 icmpv6 error-interval 200 40

ipv6 icmpv6 multicast-echo-reply enable

Use ipv6 icmpv6 multicast-echo-reply enable to enable replying to multicast echo requests.

Use undo ipv6 icmpv6 multicast-echo-reply to disable replying to multicast echo requests.

Syntax

ipv6 icmpv6 multicast-echo-reply enable

undo ipv6 icmpv6 multicast-echo-reply enable

Default

The device is disabled from replying to multicast echo requests.

Views

System view

Predefined user roles

network-admin

Usage guidelines

If a host is configured to reply to multicast echo requests, an attacker can use this mechanism to attack the host. For example, if Host A (an attacker) sends an echo request to a multicast address with Host B as the source, all hosts in the multicast group send echo replies to Host B.

To prevent attacks, do not enable the device to reply to multicast echo requests unless necessary.

Examples

# Enable replying to multicast echo requests.

<Sysname> system-view

[Sysname] ipv6 icmpv6 multicast-echo-reply enable

ipv6 icmpv6 source

Use ipv6 icmpv6 source to specify an IPv6 address as the source address for outgoing ICMPv6 packets.

Use undo ipv6 icmpv6 source to restore the default.

Syntax

ipv6 icmpv6 source [ vpn-instance vpn-instance-name ] ipv6-address

undo ipv6 icmpv6 source [ vpn-instance vpn-instance-name ]

Default

The device uses the IPv6 address of the sending interface as the source IPv6 address for outgoing ICMPv6 packets.

Views

System view

Predefined user roles

network-admin

Parameters

vpn-instance vpn-instance-name: Specifies the VPN instance to which the specified address belongs. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. The specified VPN instance must already exist. If the specified IPv6 address is on the public network, do not use this option.

ipv6-address: Specifies an IPv6 address.

Usage guidelines

It is a good practice to specify the IPv6 address of the loopback interface as the source IPv6 address for outgoing ping echo request and ICMPv6 error messages. This feature helps users to easily locate the sending device.

Examples

# Specify IPv6 address 1::1 as the source address for outgoing ICMPv6 packets.

<Sysname> system-view

[Sysname] ipv6 icmpv6 source 1::1

ipv6 mtu

Use ipv6 mtu to set the MTU of IPv6 packets sent over an interface.

Use undo ipv6 mtu to restore the default MTU.

Syntax

ipv6 mtu mtu-size

undo ipv6 mtu

Default

No MTU is configured for an interface.

Views

Interface view

Predefined user roles

network-admin

Parameters

mtu-size: Specifies the size of the MTUs of an interface, in the range of 1280 to 10240 bytes.

Usage guidelines

IPv6 routers do not support packet fragmentation. After an IPv6 router receives an IPv6 packet, if the packet size is greater than the MTU of the forwarding interface, the router discards the packet. Meanwhile, the router sends the MTU to the source host through an ICMPv6 packet — Packet Too Big message. The source host fragments the packet according to the MTU and resends it. To reduce the extra flow overhead resulting from packet drops, configure an appropriate interface MTU for your network.

Examples

# Set the MTU of IPv6 packets sent over VLAN-interface 100 to 1280 bytes.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 mtu 1280

ipv6 nd autoconfig managed-address-flag

Use ipv6 nd autoconfig managed-address-flag to set the managed address configuration flag (M) to 1 in RA advertisements to be sent.

Use undo ipv6 nd autoconfig managed-address-flag to restore the default.

Syntax

ipv6 nd autoconfig managed-address-flag

undo ipv6 nd autoconfig managed-address-flag

Default

The M flag is set to 0 in RA advertisements. Hosts receiving the advertisements will obtain IPv6 addresses through stateless autoconfiguration.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

The M flag in RA advertisements determines whether receiving hosts use stateful autoconfiguration to obtain IPv6 addresses.

·     If the M flag is set to 1 in RA advertisements, receiving hosts use stateful autoconfiguration (for example, from an DHCPv6 server) to obtain IPv6 addresses.

·     If the M flag is set to 0 in RA advertisements, receiving hosts use stateless autoconfiguration. Stateless autoconfiguration generates IPv6 addresses according to link-layer addresses and the prefix information in the RA advertisements.

Examples

# Set the M flag to 1 in RA advertisements to be sent.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd autoconfig managed-address-flag

ipv6 nd autoconfig other-flag

Use ipv6 nd autoconfig other-flag to set the other stateful configuration flag (O) to 1 in RA advertisements to be sent.

Use undo ipv6 nd autoconfig other-flag to restore the default.

Syntax

ipv6 nd autoconfig other-flag

undo ipv6 nd autoconfig other-flag

Default

The O flag is set to 0 in RA advertisements. Hosts receiving the advertisements will acquire other information through stateless autoconfiguration.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

The O flag in RA advertisements determines whether receiving hosts use stateful autoconfiguration to obtain configuration information other than IPv6 addresses.

·     If the O flag is set to 1 in RA advertisements, receiving hosts use stateful autoconfiguration (for example, from a DHCPv6 server) to obtain configuration information other than IPv6 addresses.

·     If the O flag is set to 0 in RA advertisements, receiving hosts use stateless autoconfiguration to obtain configuration information other than IPv6 addresses.

Examples

# Set the O flag to 0 in RA advertisements to be sent.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] undo ipv6 nd autoconfig other-flag

ipv6 nd dad attempts

Use ipv6 nd dad attempts to configure the number of attempts to send an NS message for DAD.

Use undo ipv6 nd dad attempts to restore the default.

Syntax

ipv6 nd dad attempts value

undo ipv6 nd dad attempts

Default

The number of attempts to send an NS message for DAD is 1.

Views

Interface view

Predefined user roles

network-admin

Parameters

value: Specifies the number of attempts to send an NS message for DAD, in the range of 0 to 600. If it is set to 0, DAD is disabled.

Usage guidelines

An interface sends an NS message for DAD after obtaining an IPv6 address.

If the interface does not receive a response within the time specified by using the ipv6 nd ns retrans-timer command, it resends an NS message.

If the interface still does not receive a response after the number of attempts reaches the threshold (set by the ipv6 nd dad attempts command), the obtained address is considered usable.

Examples

# Set the number of attempts to send an NS message for DAD to 20.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd dad attempts 20

Related commands

·     display ipv6 interface

·     ipv6 nd ns retrans-timer

ipv6 nd ns retrans-timer

Use ipv6 nd ns retrans-timer to set the interval for retransmitting an NS message.

Use undo ipv6 nd ns retrans-timer to restore the default.

Syntax

ipv6 nd ns retrans-timer value

undo ipv6 nd ns retrans-timer

Default

The local interface sends NS messages at an interval of 1000 milliseconds, and the Retrans Timer field in the RA messages sent is 0. The interval for retransmitting an NS message is determined by the receiving device.

Views

Interface view

Predefined user roles

network-admin

Parameters

value: Specifies the interval for retransmitting an NS message, in the range of 1000 to 4294967295 milliseconds.

Usage guidelines

If a device does not receive a response from the peer within the specified interval, the device re-sends an NS message.

The value specified by this command serves as the interval for the local interface to retransmit an NS message. It also serves as the value in the Retrans Timer field in RA messages sent by the local interface.

Examples

# Specify VLAN-interface 100 to retransmit NS messages at an interval of 10000 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ns retrans-timer 10000

Related commands

display ipv6 interface

ipv6 nd nud reachable-time

Use ipv6 nd nud reachable-time to set the neighbor reachable time on an interface.

Use undo ipv6 nd nud reachable-time to restore the default.

Syntax

ipv6 nd nud reachable-time value

undo ipv6 nd nud reachable-time

Default

The neighbor reachable time on the local interface is 30000 milliseconds, and the value of the Reachable Time field in RA messages is 0. The reachable time is determined by the receiving device.

Views

Interface view

Predefined user roles

network-admin

Parameters

value: Specifies the neighbor reachable time in the range of 1 to 3600000 milliseconds.

Usage guidelines

If the neighbor reachability detection shows that a neighbor is reachable, the device considers the neighbor reachable within the specified reachable time. If the device must send a packet to the neighbor after the specified reachable time expires, the device reconfirms whether the neighbor is reachable.

The value specified by this command serves as the neighbor reachable time on the local interface. It also serves as the value in the Reachable Time field in RA messages sent by the local interface.

Examples

# Set the neighbor reachable time on VLAN-interface 100 to 10000 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd nud reachable-time 10000

Related commands

display ipv6 interface

ipv6 nd ra halt

Use ipv6 nd ra halt to suppress an interface from advertising RA message.

Use undo ipv6 nd ra halt to disable this function.

Syntax

ipv6 nd ra halt

undo ipv6 nd ra halt

Default

An interface is suppressed from sending RA messages.

Views

Interface view

Predefined user roles

network-admin

Examples

# Disable RA message suppression on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] undo ipv6 nd ra halt

ipv6 nd ra hop-limit unspecified

Use ipv6 nd ra hop-limit unspecified to specify unlimited hops in RA messages.

Use undo ipv6 nd ra hop-limit unspecified to restore the default.

Syntax

ipv6 nd ra hop-limit unspecified

undo ipv6 nd ra hop-limit unspecified

Default

The maximum number of hops in the RA messages is limited to 64.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

To set the maximum number of hops to a value rather than the default setting, use the ipv6 hop-limit command.

Examples

# Specify unlimited hops in the RA messages on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ipv6 nd ra hop-limit unspecified

Related commands

ipv6 hop-limit

ipv6 nd ra interval

Use ipv6 nd ra interval to set the maximum and minimum intervals for advertising RA messages.

Use undo ipv6 nd ra interval to restore the default.

Syntax

ipv6 nd ra interval max-interval-value min-interval-value

undo ipv6 nd ra interval

Default

The maximum interval between RA messages is 600 seconds, and the minimum interval is 200 seconds.

Views

Interface view

Predefined user roles

network-admin

Parameters

max-interval-value: Specifies the maximum interval for advertising RA messages in seconds, in the range of 4 to 1800.

min-interval-value: Specifies the minimum interval for advertising RA messages, in the range of 3 seconds to three-fourths of the maximum interval.

Usage guidelines

The device advertises RA messages at intervals of a random value between the maximum interval and the minimum interval.

The maximum interval for sending RA messages should be less than or equal to the router lifetime in RA messages.

Examples

# Set the maximum interval for advertising RA messages to 1000 seconds and the minimum interval to 700 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra interval 1000 700

Related commands

ipv6 nd ra router-lifetime

ipv6 nd ra no-advlinkmtu

Use ipv6 nd ra no-advlinkmtu to turn off the MTU option in RA messages.

Use undo ipv6 nd ra no-advlinkmtu to restore the default.

Syntax

ipv6 nd ra no-advlinkmtu

undo ipv6 nd ra no-advlinkmtu

Default

RA messages contain the MTU option.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

The MTU option in the RA messages specifies the link MTU to make sure that all the nodes on the link use the same MTU.

Examples

# Turn off the MTU option in RA messages on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra no-advlinkmtu

ipv6 nd ra prefix

Use ipv6 nd ra prefix to configure the prefix information in RA messages.

Use undo ipv6 nd ra prefix to remove the prefix information from RA messages.

Syntax

ipv6 nd ra prefix { ipv6-prefix prefix-length | ipv6-prefix/prefix-length } { valid-lifetime preferred-lifetime [ no-autoconfig | off-link ] * | no-advertise }

undo ipv6 nd ra prefix { ipv6-prefix | ipv6-prefix/prefix-length }

Default

No prefix information is configured for RA messages. Instead, the IPv6 address of the interface sending RA messages is used as the prefix information.

If the IPv6 address is manually configured, the prefix uses the fixed valid lifetime 2592000 seconds (30 days) and preferred lifetime 604800 seconds (7 days).

If the IPv6 address is automatically obtained (through DHCP, for example), the prefix uses the valid and preferred lifetime of the IPv6 address.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-prefix: Specifies the IPv6 prefix.

prefix-length: Specifies the prefix length of the IPv6 address.

valid-lifetime: Specifies the valid lifetime of a prefix, in the range of 0 to 4294967295 seconds.

preferred-lifetime: Specifies the preferred lifetime of a prefix used for stateless autoconfiguration, in the range of 0 to 4294967295 seconds. The preferred lifetime cannot be greater than the valid lifetime.

no-autoconfig: Specifies a prefix not to be used for stateless autoconfiguration. If you do not specify this keyword, the prefix is used for stateless autoconfiguration.

off-link: Indicates that the address with the prefix is not directly reachable on the link. If you do not specify this keyword, the address with the prefix is directly reachable on the link.

no-advertise: Disables the device from advertising the prefix specified in this command. If you do not specify this keyword, the device advertises the prefix specified in this command.

Usage guidelines

After hosts on the same link receive RA messages, they can use the prefix information in the RA messages for stateless autoconfiguration.

Examples

# Configure the prefix information in RA messages on VLAN-interface 100.

Method 1:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra prefix 2001:10::100/64 100 10

Method 2:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra prefix 2001:10::100 64 100 10

ipv6 nd ra router-lifetime

Use ipv6 nd ra router-lifetime to configure the router lifetime in RA messages.

Use undo ipv6 nd ra router-lifetime to restore the default.

Syntax

ipv6 nd ra router-lifetime value

undo ipv6 nd ra router-lifetime

Default

The router lifetime in RA messages is 1800 seconds.

Views

Interface view

Predefined user roles

network-admin

Parameters

value: Specifies the router lifetime in the range of 0 to 9000 seconds. If the value is set to 0, the router does not serve as the default router.

Usage guidelines

The router lifetime in RA messages specifies how long the router sending the RA messages serves as the default router. Hosts receiving the RA messages check this value to determine whether using the sending router as the default router. If router lifetime is 0, the router cannot be used as the default router.

The router lifetime in RA messages must be greater than or equal to the advertising interval.

Examples

# Set the router lifetime in RA messages on VLAN-interface 100 to 1000 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra router-lifetime 1000

Related commands

ipv6 nd ra interval

ipv6 nd router-preference

Use ipv6 nd router-preference to set a router preference in RA messages.

Use undo ipv6 nd router-preference to restore the default.

Syntax

ipv6 nd router-preference { high | low | medium }

undo ipv6 nd router-preference

Default

The router preference is medium.

Views

Interface view

Predefined user roles

network-admin

Parameters

high: Sets the router preference to the highest setting.

low: Sets the router preference to the lowest setting.

medium: Sets the router preference to the medium setting.

Usage guidelines

A hosts selects a router with the highest preference as the default router.

When router preferences are the same in RA messages, a host selects the router corresponding to the first received RA message as the default gateway.

Examples

# Set the router preference in RA messages to the highest on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd router-preference high

ipv6 neighbor

Use ipv6 neighbor to configure a static neighbor entry.

Use undo ipv6 neighbor to remove a static neighbor entry.

Syntax

ipv6 neighbor ipv6-address mac-address { vlan-id port-type port-number | interface interface-type interface-number } [ vpn-instance vpn-instance-name ]

undo ipv6 neighbor ipv6-address interface-type interface-number

Default

No static neighbor entry is configured.

Views

System view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies the IPv6 address of the static neighbor entry.

mac-address: Specifies the MAC address (48 bits) of the static neighbor entry, in the format of H-H-H.

vlan-id: Specifies the VLAN ID of the static neighbor entry, in the range of 1 to 4094.

port-type port-number: Specifies a Layer 2 port of the static neighbor entry by its type and number.

interface interface-type interface-number: Specifies a Layer 3 interface of the static neighbor entry by its type and number.

vpn-instance vpn-instance-name: Specifies the VPN instance to which the static neighbor entry belongs. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If the static neighbor entry is for the public network, do not specify this option.

Usage guidelines

The IPv6 address of a neighboring node can be resolved into a link-layer address in either of the following ways:

·     Dynamically through NS and NA messages.

·     Through a manually configured static neighbor entry.

The device uniquely identifies a static neighbor entry by the neighbor's IPv6 address and the local Layer 3 interface number. You can configure a static neighbor entry by using either of the following methods:

·     Method 1—Associate a neighbor IPv6 address and link-layer address with the Layer 3 interface of the local node.

·     Method 2—Associate a neighbor IPv6 address and link-layer address with a port in a VLAN containing the local node.

You can use either of the previous configuration methods to configure a static neighbor entry for a VLAN interface.

·     If Method 1 is used, the neighbor entry is in INCMP state. After the device obtains the corresponding Layer 2 port information, the neighbor entry goes into REACH state.

·     If Method 2 is used, the corresponding VLAN interface must already exist and the port specified by port-type port-number must belong to the VLAN specified by vlan-id. After the static neighbor entry is configured, the device associates the VLAN interface with the IPv6 address to uniquely identify the static neighbor entry and the entry will be in REACH state.

To remove a static neighbor entry for a VLAN interface, specify only the corresponding VLAN interface.

Examples

# Configure a static neighbor entry for VLAN-interface 1.

<Sysname> system-view

[Sysname] ipv6 neighbor 1::1 1-1-1 interface Vlan-interface 1

Related commands

·     display ipv6 neighbors

·     reset ipv6 neighbors

ipv6 neighbor link-local minimize

Use ipv6 neighbor link-local minimize to minimize link-local ND entries.

Use undo ipv6 neighbor link-local minimize to restore the default.

Syntax

ipv6 neighbor link-local minimize

undo ipv6 neighbor link-local minimize

Default

All ND entries are assigned to the driver.

Views

System view

Predefined user roles

network-admin

Usage guidelines

Perform this command to minimize link-local ND entries assigned to the driver. Link-local ND entries refer to ND entries comprising link-local addresses.

By default, the device assigns all ND entries to the driver. With this feature enabled, the device does not add newly learned link-local ND entries whose link local addresses are not the next hop of any route to the driver. This saves driver resources.

This feature affects only newly learned link-local ND entries rather than existing ND entries.

Examples

# Minimize link-local ND entries.

<Sysname> system-view

[Sysname] ipv6 neighbor link-local minimize

ipv6 neighbor stale-aging

Use ipv6 neighbor stale-aging to set the age timer for ND entries in stale state.

Use undo ipv6 neighbor stale-aging to restore the default.

Syntax

ipv6 neighbor stale-aging aging-time

undo ipv6 neighbor stale-aging

Default

The age timer for ND entries in stale state is 240 minutes.

Views

System view

Predefined user roles

network-admin

Parameters

aging-time: Specifies the age timer for ND entries in stale state, in the range of 1 to 1440 minutes.

Usage guidelines

ND entries in stale state have an age timer. If an ND entry in stale state is not refreshed before the timer expires, it moves to the delay state. If it is still not refreshed in 5 seconds, the ND entry moves to the probe state, and the device sends an NS message for detection a maximum of three times. If no response is received, the device deletes the ND entry.

Examples

# Set the age timer for ND entries in stale state to 120 minutes.

<Sysname> system-view

[Sysname] ipv6 neighbor stale-aging 120

ipv6 neighbors max-learning-num

Use ipv6 neighbors max-learning-num to set the maximum number of dynamic neighbor entries that an interface can learn. This prevents the interface from occupying too many neighbor table resources.

Use undo ipv6 neighbors max-learning-num to restore the default.

Syntax

ipv6 neighbors max-learning-num number

undo ipv6 neighbors max-learning-num

Default

An interface can learn a maximum of 1024 dynamic neighbor entries.

Views

Layer 2/Layer 3 interface view

Layer 2 aggregate interface view

S-channel interface view

Predefined user roles

network-admin

Parameters

number: Specifies the maximum number of dynamic neighbor entries that an interface can learn. The value range is 1 to 1024.

Usage guidelines

The device can dynamically acquire the link-layer address of a neighboring node through NS and NA messages and add it into the neighbor table.

When the number of dynamic neighbor entries reaches the threshold, the interface stops learning neighbor information.

Examples

# Set the maximum number of dynamic neighbor entries that VLAN-interface 100 can learn to 10.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 neighbors max-learning-num 10

ipv6 option drop enable

Use ipv6 option drop enable to enable a device to discard IPv6 packets that contain extension headers.

Use undo ipv6 option drop enable to disable a device from discarding IPv6 packets that contain extension headers.

Syntax

ipv6 option drop enable

undo ipv6 option drop enable

Default

A device does not discard IPv6 packets that contain extension headers.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables a device to discard a received IPv6 packet in either of the following situations:

·     The packet contains a Hop-by-Hop Options header.

·     The packet contains two or more extension headers.

Examples

# Enable the device to discard IPv6 packets that contain extension headers.

<Sysname> system-view

[Sysname] ipv6 option drop enable

ipv6 pathmtu

Use ipv6 pathmtu to configure a static Path MTU for an IPv6 address.

Use undo ipv6 pathmtu to remove the Path MTU configuration for an IPv6 address.

Syntax

ipv6 pathmtu [ vpn-instance vpn-instance-name ] ipv6-address value

undo ipv6 pathmtu [ vpn-instance vpn-instance-name ] ipv6-address

Default

No static Path MTU is configured.

Views

System view

Predefined user roles

network-admin

Parameters

vpn-instance vpn-instance-name: Specifies the VPN instance that the Path MTU belongs to. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If the Path MTU is for the public network, do not specify this option.

ipv6-address: IPv6 address.

value: Specifies the Path MTU of the specified IPv6 address, in the range of 1280 to 10240 bytes.

Usage guidelines

You can configure a static Path MTU for a destination IPv6 address. When a source host sends a packet through an interface, it compares the interface MTU with the static Path MTU of the specified destination IPv6 address. If the packet size is larger than the smaller one of the two values, the host fragments the packet according to the smaller value.

Examples

# Configure a static Path MTU for an IPv6 address.

<Sysname> system-view

[Sysname] ipv6 pathmtu fe80::12 1300

Related commands

·     display ipv6 pathmtu

·     reset ipv6 pathmtu

ipv6 pathmtu age

Use ipv6 pathmtu age to configure the aging time for a dynamic Path MTU.

Use undo ipv6 pathmtu age to restore the default.

Syntax

ipv6 pathmtu age age-time

undo ipv6 pathmtu age

Default

The aging time for dynamic Path MTU is 10 minutes.

Views

System view

Predefined user roles

network-admin

Parameters

age-time: Specifies the aging time for Path MTU in minutes, in the range of 10 to 100.

Usage guidelines

After the path MTU from a source host to a destination host is dynamically determined, the source host sends subsequent packets to the destination host based on this MTU. After the aging time expires:

·     The dynamic Path MTU is removed.

·     The source host re-determines a dynamic path MTU through the Path MTU mechanism.

The aging time is invalid for a static Path MTU.

Examples

# Set the aging time for a dynamic Path MTU to 40 minutes.

<Sysname> system-view

[Sysname] ipv6 pathmtu age 40

Related commands

display ipv6 pathmtu

ipv6 prefer temporary-address

Use ipv6 prefer temporary-address to enable the system to preferentially use the temporary IPv6 address of the sending interface as the source address of a packet.

Use undo ipv6 prefer temporary-address to restore the default.

Syntax

ipv6 prefer temporary-address

undo ipv6 prefer temporary-address

Default

The system does not preferentially use the temporary IPv6 address of the sending interface as the source address of a packet.

Views

System view

Predefined user roles

network-admin

Usage guidelines

The temporary address function enables the system to generate and preferentially use the temporary IPv6 address of the sending interface as the source address of a packet. If the temporary IPv6 address cannot be used because of a DAD conflict, the system uses the public IPv6 address.

Examples

# Enable the system to preferentially use the temporary IPv6 address of the sending interface as the source address of the packet.

<Sysname> system-view

[Sysname] ipv6 prefer temporary-address

Related commands

·     ipv6 address auto

·     ipv6 nd ra prefix

·     ipv6 temporary-address

ipv6 prefix

Use ipv6 prefix to configure a static IPv6 prefix.

Use undo ipv6 prefix to remove a static IPv6 prefix.

Syntax

ipv6 prefix prefix-number ipv6-prefix/prefix-length

undo ipv6 prefix prefix-number

Default

No static IPv6 prefix is configured on the device.

Views

System view

Predefined user roles

network-admin

Parameters

prefix-number: Specifies a prefix ID in the range of 1 to 1024.

ipv6-prefix/prefix-length: Specifies a prefix and its length. The value range for the prefix-length argument is 1 to 128.

Usage guidelines

You can not use the ipv6 prefix command to modify an existing static prefix.

Dynamic IPv6 prefixes obtained from DHCPv6 servers cannot be manually removed or modified.

A static IPv6 prefix can have the same prefix ID with a dynamic IPv6 prefix, but the static one takes precedence over the dynamic one.

Examples

# Create static IPv6 prefix 2001:0410::/32 with prefix ID 1

<Sysname> system-view

[Sysname] ipv6 prefix 1 2001:0410::/32

Related commands

display ipv6 prefix

ipv6 redirects enable

Use ipv6 redirects enable to enable sending ICMPv6 redirect messages.

Use undo ipv6 redirects enable to disable sending ICMPv6 redirect messages.

Syntax

ipv6 redirects enable

undo ipv6 redirects enable

Default

Sending ICMPv6 redirect messages is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

The default gateway sends an ICMPv6 redirect message to the source of an IPv6 packet to inform the source of a better first hop.

Sending ICMPv6 redirect messages enables hosts that hold few routes to establish routing tables and find the best route. Because this function adds host route into the routing tables, host performance degrades when there are too many host routes. As a result, sending ICMPv6 redirect messages is disabled by default.

Examples

# Enable sending ICMPv6 redirect messages.

<Sysname> system-view

[Sysname] ipv6 redirects enable

ipv6 temporary-address

Use ipv6 temporary-address to enable the system to generate a temporary IPv6 address.

Use undo ipv6 temporary-address to disable temporary IPv6 address generation and remove the existing temporary addresses.

Syntax

ipv6 temporary-address [ valid-lifetime preferred-lifetime ]

undo ipv6 temporary-address

Default

The system does not generate any temporary IPv6 address.

Views

System view

Predefined user roles

network-admin

Parameters

valid-lifetime: Specifies the valid lifetime for temporary IPv6 addresses, in the range of 600 to 4294967295 seconds. The default valid lifetime is 604800 seconds (7 days). The valid lifetime must be greater than or equal to the preferred lifetime.

preferred-lifetime: Specifies the preferred lifetime for temporary IPv6 addresses, in the range of 600 to 4294967295 seconds. The default preferred lifetime is 86400 seconds (1 day).

Usage guidelines

You must enable stateless autoconfiguration before configuring the temporary address function.

The stateless address autoconfiguration enables an interface to automatically generate an IPv6 global unicast address by using the address prefix in the received RA message and the interface ID. On an IEEE 802 interface (such as an Ethernet interface or a VLAN interface), the interface ID is generated based on the MAC address of the interface and is globally unique. An attacker can exploit this rule to easily identify the sending device.

To fix the vulnerability, you can enable the temporary address function. With this function, an IEEE 802 interface generates the following addresses:

·     Public IPv6 address—Includes an address prefix in the RA message and a fixed interface ID generated based on the MAC address of the interface.

·     Temporary IPv6 address—Includes an address prefix in the RA message and a random interface ID generated through MD5.

When the valid lifetime of a temporary IPv6 address expires, the system removes the address and generates a new one. This enables the system to send packets with different source addresses through the same interface. The preferred lifetime and valid lifetime for a temporary IPv6 address are determined as follows:

·     The preferred lifetime of a temporary IPv6 address takes the smaller of the following values:

¡     The preferred lifetime of the address prefix in the RA message.

¡     The preferred lifetime configured for temporary IPv6 addresses minus DESYNC_FACTOR (a random number in the range of 0 to 600 seconds).

·     The valid lifetime of a temporary IPv6 address takes the smaller of the following values:

¡     The valid lifetime of the address prefix.

¡     The valid lifetime configured for temporary IPv6 addresses.

Examples

# Enable the system to generate a temporary IPv6 address.

<Sysname> system-view

[Sysname] ipv6 temporary-address

Related commands

·     ipv6 address auto

·     ipv6 nd ra prefix

·     ipv6 prefer temporary-address

ipv6 unreachables enable

Use ipv6 unreachables enable to enable sending ICMPv6 destination unreachable messages.

Use undo ipv6 unreachables to disable sending ICMPv6 destination unreachable messages.

Syntax

ipv6 unreachables enable

undo ipv6 unreachables enable

Default

Sending ICMPv6 destination unreachable messages is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

If the device fails to forward a received IPv6 packet because of a destination unreachable error, it drops the packet and sends a corresponding ICMPv6 Destination Unreachable error message to the source.

If the device is generating ICMPv6 destination unreachable messages incorrectly, disable sending ICMPv6 destination unreachable messages to prevent attack risks.

Examples

# Enable sending ICMPv6 destination unreachable messages.

<Sysname> system-view

[Sysname] ipv6 unreachables enable

local-proxy-nd enable

Use local-proxy-nd enable to enable local ND proxy.

Use undo local-proxy-nd enable to restore the default.

Syntax

local-proxy-nd enable

undo local-proxy-nd enable

Default

Local ND proxy is disabled.

Views

VLAN interface view

Predefined user roles

network-admin

Examples

# Enable local ND proxy on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] local-proxy-nd enable

Related commands

proxy-nd enable

proxy-nd enable

Use proxy-nd enable to enable common ND proxy.

Use undo proxy-nd enable to restore the default.

Syntax

proxy-nd enable

undo proxy-nd enable

Default

Common ND proxy is disabled.

Views

VLAN interface view

Predefined user roles

network-admin

Examples

# Enable common ND proxy on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] proxy-nd enable

Related commands

local-proxy-nd enable

reset ipv6 neighbors

Use reset ipv6 neighbors to clear IPv6 neighbor information.

Syntax

reset ipv6 neighbors { all | dynamic | interface interface-type interface-number | slot slot-number | static }

Views

User view

Predefined user roles

network-admin

Parameters

all: Clears static and dynamic neighbor information for all interfaces.

dynamic: Clears dynamic neighbor information for all interfaces.

interface interface-type interface-number: Specifies an interface by its type and name.

slot slot-number: Specifies an IRF member device by its member ID.

static: Clears static neighbor information for all interfaces.

Usage guidelines

You can use the display ipv6 neighbors command to display IPv6 neighbor information.

Examples

# Clear neighbor information for all interfaces.

<Sysname> reset ipv6 neighbors all

This will delete all the entries. Continue? [Y/N]:Y

# Clear dynamic neighbor information for all interfaces.

<Sysname> reset ipv6 neighbors dynamic

This will delete all the dynamic entries. Continue? [Y/N]:Y

Related commands

·     display ipv6 neighbors

·     ipv6 neighbor

reset ipv6 pathmtu

Use reset ipv6 pathmtu to clear the Path MTU information.

Syntax

reset ipv6 pathmtu { all | dynamic | static }

Views

User view

Predefined user roles

network-admin

Parameters

all: Clears all Path MTUs.

dynamic: Clears all dynamic Path MTUs.

static: Clears all static Path MTUs.

Examples

# Clear all Path MTUs.

<Sysname> reset ipv6 pathmtu all

Related commands

display ipv6 pathmtu

reset ipv6 statistics

Use reset ipv6 statistics to clear IPv6 and ICMPv6 packet statistics.

Syntax

Centralized devices:

reset ipv6 statistics [ slot slot-number ]

Views

User view

Predefined user roles

network-admin

Parameters

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

You can use the display ipv6 statistics command to display the IPv6 and ICMPv6 packet statistics.

Examples

# Clear IPv6 and ICMPv6 packet statistics.

<Sysname> reset ipv6 statistics

Related commands

display ipv6 statistics